New Delhi: The CBI on Tuesday told a Parliamentary panel that A Raja constantly misled Prime Minister Manmohan Singh on the 2G license case and also said it has so far found no criminality on part of Home Minister P Chidambaram on the issue.

Appearing before the Joint Parliamentary Committee examining the 2G case, top CBI officials led by probe agency chief A P Singh on Tuesday briefed the panel on the progress in the investigation.

The CBI is learnt to have told the panel that as per its investigations so far Raja, the then Telecom Minister, constantly misled the Prime Minister on the issue of allocation of 2G spectrum to telecom operators.

The probe agency also said that so far it has not found any criminality in the role of Chidambaram, the then Finance Minister, on the issue of 2G radiowaves allocation.

It is understood that the CBI has not found anything incriminating against Chidambaram in connection with the Aircel-Maxis deal.

On the issue of infusion of foreign equity in telecom firms, the CBI is learnt to have told the panel that there was no siphoning of money by the companies involved in the 2G case.

The CBI officials are learnt to have said that they were still investigating Reliance Telecom's alleged transfer of shares to Mauritius-based Delphi Investments.

The investigators told the panel that they were still probing whether the transfer of shares was a quid pro quo arrangement in exchange of spectrum.

Some members questioned CBI's "failure" in initiating action against Attorney General G E Vahanvati on the issue of allegedly helping Raja in drafting a press release on the advancing of cut-off date for spectrum allocation.

Some members also slammed the agency for the 14-month delay in initiating action into the 2G scam.

Agency officials are learnt to have said that they swung into action only after they realised the magnitude of the scam when the report of the Comptroller and Auditor General was released.

The CBI is understood to have said that it was also probing Unitech's investment of USD 51 million in the Isle of Man, around the time when it was allocated 2G spectrum.

The agency said it suspected that this money was used as a quid pro quo to pay public servants in lieu of allocation of 2G spectrum.